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10 个 PHP 关于字符串处理的代码片段

[代码] 移除 HTML 标签

1 $text = strip_tags($input, "");

[代码] 返回 $start 和 $end 之间的文本

1 function GetBetween($content,$start,$end){
2     $r = explode($start, $content);
3     if (isset($r[1])){
4         $r = explode($end, $r[1]);
5         return $r[0];
6     }
7     return '';
8 }

[代码] 将url转换成链接

1 $url = "Jean-Baptiste Jung (http://www.webdevcat.com)";
2 $url = preg_replace("#http://([A-z0-9./-]+)#", '<a href="http://www.catswhocode.com/blog/$1" style="font-size: 12px; vertical-align: baseline; background-color: transparent; margin: 0px; padding: 0px; color: #3777af; text-decoration: none; font-weight: bold">$0</a>', $url);

[代码] 切分字符串为140个字符

01 function split_to_chunks($to,$text){
02     $total_length = (140 - strlen($to));
03     $text_arr = explode(" ",$text);
04     $i=0;
05     $message[0]="";
06     foreach ($text_arr as $word){
07         if ( strlen($message[$i] . $word . ' ') <= $total_length ){
08             if ($text_arr[count($text_arr)-1] == $word){
09                 $message[$i] .= $word;
10             } else {
11                 $message[$i] .= $word . ' ';
12             }
13         } else {
14             $i++;
15             if ($text_arr[count($text_arr)-1] == $word){
16                 $message[$i] = $word;
17             } else {
18                 $message[$i] = $word . ' ';
19             }
20         }
21     }
22     return $message;
23 }

[代码] 删除字符串中的URL

1 $string = preg_replace('/\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|$!:,.;]*[A-Z0-9+&@#\/%=~_|$]/i', '', $string);

[代码] 将字符串转成SEO友好的字符串

1 function slug($str){
2     $str = strtolower(trim($str));
3     $str = preg_replace('/[^a-z0-9-]/', '-', $str);
4     $str = preg_replace('/-+/', "-", $str);
5     return $str;
6 }

[代码] 解析 CSV 文件

1 $fh = fopen("contacts.csv", "r");
2 while($line = fgetcsv($fh, 1000, ",")) {
3     echo "Contact: {$line[1]}";
4 }

[代码] 字符串搜索

1 function contains($str, $content, $ignorecase=true){
2     if ($ignorecase){
3         $str = strtolower($str);
4         $content = strtolower($content);
5     }
6     return strpos($content,$str) ? true : false;
7 }

[代码] 检查字符串是否以某个串开始

1 function String_Begins_With($needle, $haystack {
2     return (substr($haystack, 0, strlen($needle))==$needle);
3 }

[代码] 从字符串中提取email地址

01 function extract_emails($str){
02     // This regular expression extracts all emails from a string:
03     $regexp = '/([a-z0-9_\.\-])+\@(([a-z0-9\-])+\.)+([a-z0-9]{2,4})+/i';
04     preg_match_all($regexp, $str, $m);
05  
06     return isset($m[0]) ? $m[0] : array();
07 }
08  
09 $test_string = 'This is a test string...
10  
11         test1@example.org
12  
13         Test different formats:
14         test2@example.org;
15         <a href="test3@example.org">foobar</a>
16         <test4@example.org>
17  
18         strange formats:
19         test5@example.org
20         test6[at]example.org
21         test7@example.net.org.com
22         test8@ example.org
23         test9@!foo!.org
24  
25         foobar
26 ';
27  
28 print_r(extract_emails($test_string));

[代码] [PHP]代码

view sourceprint?
01 function extract_emails($str){
02     // This regular expression extracts all emails from a string:
03     $regexp = '/([a-z0-9_\.\-])+\@(([a-z0-9\-])+\.)+([a-z0-9]{2,4})+/i';
04     preg_match_all($regexp, $str, $m);
05  
06     return isset($m[0]) ? $m[0] : array();
07 }
08  
09 $test_string = 'This is a test string...
10  
11         test1@example.org
12  
13         Test different formats:
14         test2@example.org;
15         <a href="test3@example.org">foobar</a>
16         <test4@example.org>
17  
18         strange formats:
19         test5@example.org
20         test6[at]example.org
21         test7@example.net.org.com
22         test8@ example.org
23         test9@!foo!.org
24  
25         foobar
26 ';
27  
28 print_r(extract_emails($test_string));
posted on 2011-11-12 19:16  没想到啊  阅读(151)  评论(0)    收藏  举报